Plural-fuse cut-out.



No. 694,9l2. Patented Mar. 4', 1902..

C. J. DORSEY.

PLURAL FUSE CUT-OUT.

I (Application fil ug 80, 1900 ne ed June 21, 1 01 (No Model.)

J v M e W g UNITED STATES PATENT OEEIQ CHARLES J. DORSEY, OF BALTIMORE,MARYLAND, ASSlGNOR OF ONE-HALF TO JACOB FELSENSTEIN, OF BALTIMORE,MARYLAND.

PLU RAL-FUSE CUT-OUT.

SPECIFICATION forming part of Letters Patent No. 694,912, dated March 4,1902.

Application filed August 30, 1900. Renewed June 21, 1901. Serial No.65,507. (No model.)

To (tZZ whom, it may concern.- cave seats to receive the key when turnedto Be it known that 1, CHARLES J. DORSEY, an operative situation.resident of Baltimore, in the State of Marydenotes a key having anon-conducting land,haveinvented certain newand usefullmhandle,preferably molded on the metallic or 5 provementsin Plural-FuseOutOuts;andI do conducting part 21 of the key, which may be hereby declare thefollowing to be a full, clear, made oblong in cross-section, with itsshortest and exact description of the invention, such diameter a littleless than the distance beas willenable others skilledin the art to whichtween the bar 12 and the blocks 17. The

it pertains to make and use the same. electrical circuit is completed byinserting I0 The invention relates to plural-fuse cutthe key through oneof the openings 22 in the outs and cut-out boxes for electric circuits,inclosure or cover and turning it so as to and has for its'objeets toinsureoertaint-y and bring the longest diameter-0f the key part 21efficiency in action, whereby the circuit is transverse to the bar 12.This compresses broken, and ease and certainty in the renewal thesprings and insures a good electrical con- I5 of a broken circuit. fact.

The invention consists in the construction 22 denotes shoulders on thekey, one of herein described and pointed out. which when the key isinserted and turned, In the accompanying drawings, Figure 1 is as juststated, engages under a bar or flange a plan of the device opened. Fig.2 is a cen- 23, whereby the key is held in place. 2o tral section of thedevice closed. Fig. 3 is a The fuses 15 or 16 may be of any suitabletransverse section. form and material.

Numeral 1 denotes a frame of any conven- 21 denotes binding-keys toprovide for corn ient or desirable form and material to containveniently replacing the fuses melted out. metal electric connections andinsulating ma 25 denotes a fork to engage one of a pair of 25 terialPreferably the frame is provided binding screws, and 26 a hook to engageanwith brackets 2 forsecuringit toa car or other other.

structure. The improvement contemplates fuses in 3 denotes a frame tohold a cover 4, and 5 closed in tubes and other fuses. denotes hingesconnecting the frames. lf de- Preferably the blocks 17, thefuse-recepta- 3o sired, the frame 3 may have a casing-plate 6. cles 27,and the bar 11 will be fixed or formed,

7 denotes ventilatingaperturesin the cover as the case may be, in thebody of non-conand its casing-plate. The for' i and number ductingmaterial by molding said material in of these openings are not materialand may be a plastic state and subsequently hardening it. varied atpleasure or they may be dispensed The part of the cover havingreceptacles 28, 35 with without defeating the other parts of the whichcoaet to inclose the fuses, can also be invention. formed by molding,ventilating-openings of 9 and 10 denote wires of an electric circuit anysuitable shape being provided, if desired. secured, respectively, tometal bars 12 and 11 While it is practicable to make the boX of bybinding-screws 1S and 1-1. two parts molded from a non-conducting ma- 9o40 15 and 1G denote short fusible conductors terial or composition,other forms built up of connecting the bar 11 with blocks 17, madeseparatepieces arenot excluded. The frames of conducting material, and20 is a key havthat surround the non-conducting material ing a shank 18and conducting part 21 for are convenient and suitable, butnot essentialcompleting the circuit between the block 0011- in all cases, and the twoparts of the box or A 45 nected with any particular fusible conductorinclosure maybe connected in any praetica- 16 and the bar 12. The bar 2is forced toble manner ward the blocks 17 by springs 18 and 18*,Heretofore the fuse connections made of and 19 denotes abutments orportions of the spring-plate andconstituting movablecircuitnon-conducting inclosure that hold the bar a closers have beenliable to be partially melted too 50 suitable distance from blocks 17.The blocks and have also been welded to the coacting and bars may beprovided with shallow coneleetrodes by the metal blown from a suditsfunctions cannot be disturbed by particles fixed in integral blocks ofnon-conducting. material and that such blockscau be made to, inclose thefuses and constitute a box there-, for.v The provisionfor ventilationpermits denly-melted fuse, and particles of the fuse have also beendeposited and harden edon adjacent connections, so that when'they weresubsequently put in circuit such particles prevented thorough completionof the circuit, with the result that they were 'remelted and welded theparts together. By my construe tion the use of aspringorsheet-metalcircuit-' closer is obviated and akey is used of sufficient thickness toprevent fusion. Further, this keyhas a widebearing onthecontiguous partsof the circuit, and connection'is maintained by spriug-pressurein suchaway that of a melted fuse. If suchparticlesarelodged on the key, itwill not be on its bearing portions, and the' rotation of the keyagainst spring-pressure insures athorough electrical contact when it ismoved to com plete the circuit through a new fuse. f The ease with whichthe .withwhich they can be putin circuit are important advantages. It isalso an advantage that the conductors and theirconnectidns are the readyesoapeof suddenly-expanded air-,vapor,and gases without injury to'theelectrical connections when a fuse is, suddenly melted or blown. Thereceptacles for the fuses are such as to permit theme of various kindswithout inconvenience, The; parts are of such form and arrangement and'are 'so combined that small metalpieces otherthan the fuses areavoided. This and other objections tothe rotary fuse cut-outs heretoforeproposed are obviated. It will be understood that any suitable materialscan be employed and that the mechanical modifications above mentionedand other like changes may be made,

provided the substantial principles'of operation and construction arenot departed from.

Having thus described my invention, what a I claim as new, and desire tosecure by Letters fuses can: be sup pliedin thebox and the easejandcertainty circuit, 'condjuctor-blocks connected to the6o other ends ofthe fuses, a detachable key whereby any fuse can be putin circuit, and anon-conducting inolosure having holes corresponding to the fuses forinserting the key, said hey having'its conducting part oblong incross-section and directly-removable from the -inolosure.

3. In a thermal electrical cut-out, a series of fuses each connected atone end to the main circuit, conductor-blocks connected to the otherendsof the fusesya key whereby any 7 section .can be put in circuit,andanon-con ducting inclosure having holes corresponding to the'fu'ses forinserting the key, said, key having its'conducting part oblong incross'-section and means to lock it in position when turned 7 tocomplete the circuit;

parts connected to the other ends of the said fusibleconductingsect'ions, and a detachable key to connect the block of anysection at will" with the otherbar, the conducting portion ofsaid'keybeing oblong in-cross-section.

5. Ina thermal electrical cut-out, a circuit comprising two separatebars, one of said bars being movable, a seriesof fusibleconductingsectious each connected to one of said bars, a detachablekeyto connect any section at will with the other bar, and springs tohold the movable bar in suitable relation to the sections. 1 I a 6. In athermal electrical cut-out, two elec trodes, a key for use in closing acircuit be r 4." In'athermal electrical cut-out, a circuitcomprisin'gtwo separate'bars, a series of fusible conducting-sectionseach connected to one of said bars, a series, of conducting blocks ortween the electrodes, said key having its 0on ducting part oblong incross section and provided with. the shoulderto engage behind aretaining-bar, and means for rotatably supporting it between theelectrodes. I 7.. In a thermal electricalcut-out, hollow IOOreceptaclesfor fuses, a conductor'connected to the fuses at one endthereof, means formaking contact between the opposite end of each fuseand auother'conductor, and bind ing-posts at each end of thereceptacles, said receptacles having a non-conducting cover withventilating-openings adjacent the fuses for escape of metal. v p

-'In testimony whereof I have signed this specification in the presenceof two subscribing witnesses.

CHARLES J. DORSEY.

Witnesses:

S. A. TERRY, BENJ. R. CAT IN.

